Finding the Fourth Proportional to 16,385.06, 22,613.30 and 9,312.55

Step by Step Solution

1. Step 1: Write the proportion equation
   16,385.06 : 22,613.30 = 9,312.55 : x
2. Step 2: Convert to fraction form
   16,385.06/22,613.30 = 9,312.55/x
3. Step 3: Cross multiply
   16,385.06x = 22,613.30 × 9,312.55
4. Step 4: Simplify right side
   16,385.06x = 210,587,486.92
5. Step 5: Solve for x
   x = 210,587,486.92/16,385.06
6. Step 6: Final answer
   x = 12,852.41